Patterns
What rule does the pattern below follow?
5, 10, 15, 20
+5
Ari is thinking of a prime number between 30 and 35. What number is she thinking of
31
How many factors does 12 have?
What are they
12 has 6 factors
1, 2,3,4,6,12
How can I tell if a number is divisible by 3 and/or 9 without dividing?
The sum of its digits is a multiple of 3 or 9.
Roberto has 2 books with 319 pages each, and 3 books with 264 pages each. How many pages are there all together?
1430 pages
What rule does the pattern below follow?
1, 2, 4, 8, 16, 32, 64, 128
n x 2 = p
Is this number prime or composite?
3
prime
Is 87 divisible by 3? Why?
yes, because the sum of its digits is 15. 15 is a multiple of 3, therefore 87 is divisible by 3.
Which equation is true?
a.54 ÷ 9 = 9 x 6
b.5 x 6 = 30 – 5 -5 -5 -5
c.24 ÷ 3 = 24 -4 -4 -4 -4
d.18 ÷ 9 = 6 x 3
a.54 ÷ 9 = 9 x 6
What rule does the pattern below follow?
108, 36, 12, 4
divide by 3
Is this number prime or composite?
36
composite
How many kinds of rectangle can you make with 42 tiles?
6
1x42=42; 42x1=42
6x7=42; 7x6=42
2x21=42; 21x2=42
3x14=42; 14x3=42
is 364 divisible by 3? WHY?
must answer both parts to receive points.
No
3+6+4=13, and 13 is not divisible by 3, therefore neither is 364.
A pizza shop sold 18 medium pizzas. The number of large pizzas sold was 3 times as many as the number of medium pizzas sold. How many medium and large pizzas did the pizzas shop sell altogether?
a.36 pizzas
b.39 pizzas
c.54 pizzas
d.72 pizzas
d. 72 pizzas
What is the rule and the 7th number in the pattern?
99, 88, 77, 66
the rule: subtract 11
the 7th position: 33
Give me 2 examples of a prime number and 2 examples of a composite number.
Many possible choices, teacher will check.
Select all the true statements about the number 84:
a. 42 is a factor of 84
b. 84 is a composite number
c. 84 has exactly 4 factor pairs
d. 84 is a prime number
e. one factor pair of 84 is 7 and 12
a, b, and e
Which numbers are even?
55, 26, 15498, 1233, 4, 660, 97
26
15498
4
660
think: 28, __, __, __, __
16
What makes a number prime? provide an example.
the only way to make a prime number is to multiply itself by 1.
5 = 1 x 5
Which of the following are factors of both 18 and 30?
a. 1
b. 3
c. 4
d. 6
e. 14
1, 3, 6
What needs to be looked at to decide if a number is divisible by 2, 5, or 10?
We have to analyze the ones-place
Rachel has 3 times as many roses as tulips. She has 12 fewer tulips than daisies. There are 15 daisies. How many flowers does rachel have in all?
a. 63 flowers
b. 42 flowers
c. 27 flowers
d. 21 flowers
c. 27 flowers